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# AC_C_LTO
# -------------
# Define HAVE_LTO if -flto works.
AN_IDENTIFIER([lto], [AC_C_LTO])
AC_DEFUN([AC_C_LTO],
[AC_CACHE_CHECK([if -flto builds executables], ac_cv_c_lto,
[AC_RUN_IFELSE(
[AC_LANG_SOURCE(
[[#include <stdio.h>
int main(int argc, char **argv) {
return 0;
}
]])],
[ac_cv_c_lto=yes],
[ac_cv_c_lto=no],
[ac_cv_c_lto=${ac_cv_c_lto_cross_compile}])])
if test "${ac_cv_c_lto}" = "yes"; then
AC_DEFINE([HAVE_LTO], 1,
[Define to 1 if -flto works.])
fi
])# AC_C_LTO
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